A mega discovery (Patreon)

Taunnie (Pokémon) and Ricca (original character) decided to go swimming in a nearby river. They noticed a small light shining on the lake bed.

They took the plunge together and discovered that it wasn't just a shiny stone, but a Mega Stone!

I wonder who that belongs to?

Ricca is an original character belonging to the requester of the illustration.